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. 2009 Aug 4;1:258–264. doi: 10.1093/gbe/evp026

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© The Author(s) 2009. Published by Oxford University Press on behalf of the Society for Molecular Biology and Evolution.

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/2.5), which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

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FIG. 1.— — Evolutionary changes of the number of OR genes in primates. The numbers within rectangular boxes are the estimated number of OR genes in ancestral species. The red numbers above each branch are those of gained genes, and the green numbers below each branch are those of lost genes.